error while creating thumbnail RSS

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  atiqjaved

  Member

  20 Points

  64 Posts

  error while creating thumbnail

  Nov 03, 2010 02:00 AM|LINK

  I am getting the following error:

  
  

  Failed to map the path '/uploads/Lighthouse_thumb.jpg'.

  
  

  Below is the code:

  
  

  Public Sub imageThumbnail(ByVal photoName As String)
          'Read in the image filename to create a thumbnail of
          Dim imageUrl As String = photoName
  
  
          'Read in the width and height
          Dim imageHeight As Integer = 132
          Dim imageWidth As Integer = 132
  
  
          'Make sure that the image URL doesn't contain any /'s or \'s
          If imageUrl.IndexOf("/") >= 0 Or imageUrl.IndexOf("\") >= 0 Then
              'We found a / or \
              Response.End()
          End If
  
  
          'Add on the appropriate directory
          imageUrl = "/uploads/" & imageUrl & "_thumb.jpg"
  
  
          Dim fullSizeImg As System.Drawing.Image
          fullSizeImg = System.Drawing.Image.FromFile(Server.MapPath(imageUrl))
  
  
          'Do we need to create a thumbnail?
          Response.ContentType = "image/gif"
          If imageHeight > 0 And imageWidth > 0 Then
              Dim dummyCallBack As System.Drawing.Image.GetThumbnailImageAbort
              dummyCallBack = New _
                 System.Drawing.Image.GetThumbnailImageAbort(AddressOf ThumbnailCallback)
  
  
              Dim thumbNailImg As System.Drawing.Image
              thumbNailImg = fullSizeImg.GetThumbnailImage(imageWidth, imageHeight, _
                                                           dummyCallBack, IntPtr.Zero)
  
  
              thumbNailImg.Save(Response.OutputStream, ImageFormat.Gif)
  
  
              'Clean up / Dispose...
              thumbNailImg.Dispose()
          Else
              fullSizeImg.Save(Response.OutputStream, ImageFormat.Gif)
          End If
  
  
          'Clean up / Dispose...
          fullSizeImg.Dispose()
      End Sub

  
  

  
  

  Any help would be much appreciated...

  Thanks
  

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  anas

  All-Star

  73649 Points

  7914 Posts

  Moderator

  Re: error while creating thumbnail

  Nov 06, 2010 09:02 PM|LINK

  atiqjaved

          imageUrl = "/uploads/" & imageUrl & "_thumb.jpg"  

  Try to prefix the path with the tilde character:

  imageUrl = "~/uploads/" & imageUrl & "_thumb.jpg"

  This way, you will make sure that you are always starting from the root website folder not matter from where you call the MapPath.
  

  
  

  Anas Ghanem
  • Marked as answer by Song-Tian - MSFT on Nov 09, 2010 07:41 AM